Windows 窗体 C# 通过代码更改用户控件 [英] Windows form C# change user control by code

问题描述

我有一个 windows 窗体，我不想让任何其他 windows 窗体只是一个 windows 窗体和不同的用户控件如何在用户控件之间进行更改，例如隐藏一个并以编程方式显示另一个用户控件?

I have a windows form and i dont want to make any other windows forms just one windows form and different user controls how can i change between user controls for example hide one and show the other user control programmatically ?

private void Btt_info_Click(object sender, EventArgs e)
{
    Frm_Main frm_main = new Frm_Main();
    frm_main.Controls["panel1"].Controls.Clear();
    UC_Info uc_info = new UC_Info();
    frm_main.Controls["panel1"].Controls.Add(uc_info);
}

我添加了这个但它不起作用

i added this but it doesnt work

推荐答案

添加一个容器控件(如果我没记错的话，工具箱中有一个容器部分?)，就像一个面板.为您想要动态切换的内容创建用户控件.所以像'HomePage'用户控件和'LoginPage'用户控件.将要显示的用户控件动态添加到容器中.需要时，将其从容器中移除并添加不同的用户控件:

Add a container control (if I remember correctly, there's a containers section in the toolbox?), like a panel. Create usercontrols for what you want to dynamically switch around. So make like a 'HomePage' usercontrol and a 'LoginPage' usercontrol. Dynamically add the usercontrol that you want to display to the container. WHen you want, remove it from the container and add a different usercontrol:

Panel myPanel = new Panel();
LoginPage ctlLoginPage = new LoginPage();
HomePage ctlHomePage = new HomePage();

//add the loginpage to the panel first
myPanel.Controls.Add(ctlLoginPage);

...do stuff...

//remove whatever control is currently in the Panel
myPanel.Controls.Clear();
//add the other control, the HomePage control instead now
myPanel.Controls.Add(ctlHomePage);

..do other stuff...

我通常这样做是为了让表单本身保持打开状态，以添加可能在不同页面"之间共享的通用控件和内容.

I usually do it this way so you leave your form itself open to add common controls and stuff that might be shared between your different 'pages'.

请注意，我通常会在设计器中添加面板，而不是在代码中动态创建它.这只是一个例子.

Note that I normally would add the panel in the designer and not create it dynamically in the code. This was just an example.

主窗体和用户控件之间的交互可以通过几种不同的方式进行处理，我并不是说这些方法中的任何一种都是正确的方法.

The interaction between your mainform and usercontrols can be handled in a few different ways, and I am not saying that any of these is the correct method.

• 您在 Mainform 上为 Panel 创建一个静态属性，以便您可以随时访问它以交换您的控件.

在这个例子中，我还将为其添加一个静态方法

In this example I'll also add a static method for it

enum PanelControlsEnum {HomePage, LoginPage};
public static Panel MyContainerPanel {get;set;}
public static void SwitchPanelControls(PanelControlsEnum selControl){
  ..put your switch panels code here..
}

然后在您的用户控件中调用一个预定义的方法，例如:

Then inside your usercontrol you call a predefined method, something like:

MainForm.SwitchPanelControls(PanelControlsEnum.HomePage);

• 另一种方法是在你的主窗体上绑定按钮点击事件而不是表单内部.

像这样:

HomePage ctlHomePage = new HomePage();
ctlHomePage.Click += MyClickEvent;
myPanel.Controls.Add(ctlHomePage)

...

private void MyClickEvent(object sender, RoutedEventArgs e)
{
  ..switch user control code here...
}

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